Seborrhoeic dermatitis




Seborrhoeic dermatitis


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USMLE® Step 1 questions

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High Yield Notes

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Seborrhoeic dermatitis

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USMLE® Step 1 style questions USMLE

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A 28-year-old man presents to the office because of flaky, itchy, white scales on the scalp. He is unable to recall its onset but states that it has been bothering him for “a while now.” He washes his scalp with mild shampoo once every two days and his face with cold water twice daily. Past medical history is noncontributory. Vitals are within normal limits. During the encounter, he repeatedly scratches his face over the area between the nose and the mouth. Physical examination shows greasy scaliness of the skin of the face and the area behind the ear as shown:  

 Reproduced from: Wikimedia Commons

Reproduced from:

Which of the following is the most likely cause of this patient’s condition?

External References

First Aid






Antifungal drugs

seborrheic dermatitis p. 488

Parkinson disease p. 538

seborrheic dermatitis association p. 488

Plaques (skin) p. 487

seborrheic dermatitis p. 488

Scales (skin) p. 487

seborrheic dermatitis p. 488

Seborrheic dermatitis p. 488


Seborrheic dermatitis is an inflammatory skin disorder, which is characterized by chronic, relapsing form of papulosquamous and erythematous plaques, sometimes itchy, typically distributed on the scalp, face, and other areas rich in the sebaceous gland. Treatment options include topical antifungals, frequent shampooing, and the application of an emollient.


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